Fluid reservoir for paint spray gun

ABSTRACT

A fluid reservoir for a paint spray gun comprises a container having an opening and a cover body that sleeves on the opening; the cover body is provided with a connecting port that connects with the paint spray gun; a side of the container has scale and the container is provided with a ventilation device; a filtering device is installed in the fluid reservoir; the cover body is provided with a groove corresponding to the periphery of the container opening; the periphery of container opening is inserted into the groove; a buckle mechanism connects the cover body with the container. Compared with the structure of screw thread connection, such connection manner improves the tightness between the cover body and the container, and makes the cover body and the container easier to be assembled and disassembled.

FIELD OF THE INVENTION

The present invention relates to a fluid reservoir for a paint spraygun.

BACKGROUND OF THE INVENTION

Conventionally, a fluid reservoir for a spray gun generally includes acontainer and a cover that are connected by screw threads. The cover isprovided with a vent on a top thereof, or the container is provided witha ventilation device. As the connection screw threads of the containerand the outer surface of the container have a smooth transition, whenthe paint is spilled accidentally in the course of feeding or pouring,the spilled paint may directly flow through the connection screw threadsand contaminate a large area of the outer surface of the container,which causes difficulty in cleaning the container.

Chinese Utility Model Patent No. CN201006515 entitled “PAINT TANK WITHORNAMENT RING FOR PAINT SPRAY GUN” discloses a paint tank with anornament ring for a paint spray gun that includes a paint tank body anda cover that connects with the paint tank body by screw threads. Aventilation device is buckled at the center of the top of the cover. Anornament ring is disposed below the position where the paint tank bodyand the cover are connected by the screw thread. An annular groove isopened on an upper surface of the ornament ring. This utility model addsan ornament ring structure on an existing paint tank, and thus has thecharacteristics of having a simple structure and being easy to use,prevents the large-area paint contamination to the paint tank body, andmeanwhile provides the convenience for differentiating different paints.Although this utility model solves the problems of large-area paintcontamination to the paint tank body, the paint still has a chance ofcontamination to the screw thread of the paint tank body or the cover,which incurs difficulty in assembling or disassembling of the paint tankbody and the cover or even worse the paint tank body and the covercannot be assembled or disassembled due to the contamination of thepaint or a leakage occurs after the assembly.

SUMMARY OF THE INVENTION

To overcome the defects existing in the related art, the presentinvention is directed to a fluid reservoir for a paint spray gun havinga simple structure with improved tightness between the cover body andthe container.

The present invention provides a fluid reservoir for a paint spray gun,which includes a container having an opening and a cover body thatsleeves on the container opening. The cover body is provided with aconnecting port that connects with the paint spray gun. A side of thecontainer has a scale and the container is provided with a ventilationdevice. A filter device is installed in the fluid reservoir. The coverbody is provided with a groove corresponding to the periphery of thecontainer opening. The periphery of the container opening is insertedinto the groove. A buckle mechanism tightly connects the cover body andthe container.

The fluid reservoir for the paint spray gun of the present inventionfurther has the following technical features.

The buckle mechanism includes a clamping wing disposed on the cover bodyand a rib disposed on the container and buckled with the clamping wing.

Alternatively, the buckle mechanism includes a clamping wing disposed onthe container and a rib disposed on the cover body and buckled with theclamping wing.

The clamping wing is provided with a retainer, and the retainer isbuckled with the rib.

The filter device is a filter screen having a buckle portion, and thefilter screen is buckled on the cover body.

The filter screen is provided with a reinforcing rib, and thereinforcing rib at least includes an annular ring buckled with the coverbody.

The filter screen is provided with a raised portion departing from theconnecting port.

A seal ring is installed in the groove, and the periphery of thecontainer opening abuts against the seal ring.

The connecting port is provided with an inserted member, and theinserted member is used together with the paint spray gun.

The container is provided with or formed with a placement portion forplacing horizontally.

As compared with the related art, the fluid reservoir for the paintspray gun of the present invention at least has the followingadvantages.

Firstly, as compared with the related art, in the fluid reservoir forthe paint spray gun of the present invention, the cover body is providedwith a groove corresponding to the periphery of the container openingand the periphery of the container opening is inserted into the groove,which improves the tightness between the cover body and the container.The cover body and the container are connected by a buckle mechanism,which further improves the connection tightness of the container. Thisstructure in comparison with the screw thread connection structure iseasier to be assembled and disassembled. Secondly, the buckle mechanismincludes a clamping wing and a rib buckled with the clamping wing. Thebuckle structure improves the attachment strength between the cover bodyand the container, so that the fluid reservoir has a better sealingperformance. Furthermore, the filter screen is provided with a raisedportion departing from the connecting port and the filter screen may bedetached from the cover body by pulling the raised portion, which isconvenient for cleaning and replacement of the cover body. Finally, theconnecting port is provided with an inserted member, and the insertedmember is used together with the paint spray gun, in which differentinserted members may be disposed for matching different models of thepaint spray gun.

The additional features of the present invention will be illustrated inthe following description and may be apparent from the description ormay be known from the practice of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will become more fully understood from thedetailed description given herein below for illustration only, and thusare not limitative of the present invention, and wherein:

FIG. 1 is a schematic view of a fluid reservoir for a paint spray gun ofone embodiment of the present invention;

FIG. 2 is a schematic enlarged view of part A of FIG. 1;

FIG. 3 is a schematic enlarged view of part B of FIG. 1;

FIG. 4 is a schematic side view of a filter screen of the embodiment ofthe present invention; and

FIG. 5 is a schematic front view of the filter screen of the embodimentof the present invention.

DETAILED DESCRIPTION OF THE INVENTION

Hereinafter, the embodiments of the present invention will be describedin detail with reference to the accompanying drawings in which the likereference numerals indicate the same elements. The present inventionwill be explained below through the embodiments described with referenceto the accompanying drawings. The embodiments are exemplary and shouldnot be regarded as limitations to the present invention.

Referring to FIG. 1 to FIG. 5, a fluid reservoir for a paint spray gunof the present invention includes a container 1 having an opening and acover body 2 that sleeves on the opening of the container 1. The coverbody 2 is provided with a connecting port 3 that connects with the paintspray gun. The connecting port 3 and the paint spray gun may beconnected by a screw thread formed on the connecting port 3. A side ofthe container 1 has a scale and the container 1 is provided with aventilation device 4. The scale is provided for the convenience ofobserving the residue amount of the paint inside the container 1. Hence,the container may be made of a transparent material or asemi-transparent material, such as semi-transparent plastic. Theventilation device 4 may be opened or closed. When the fluid reservoiris not in use or the paint is filled in the fluid reservoir, theventilation device 4 may be closed. When the paint spray gun is in useand the fluid reservoir is installed on the paint spray gun, theventilation device is opened in communication with the atmosphere torefill air into the space of the paint that flows out of the paint spraygun. A filter device 5 is installed in the fluid reservoir. The filterdevice 5 filters the paint filled in the fluid reservoir to prevent thepaint spray gun from being clogged by impurities. The cover body 2 isprovided with a groove 6 corresponding to the periphery 11 of theopening of the container 1. The periphery 11 of the opening of thecontainer 1 is inserted into the groove 6, which improves the tightnessof connection between the cover body 2 and the container 1. To furtherimprove the tightness, a seal ring may be installed in the groove 6 andthe periphery 11 of the opening of the container 1 abuts against theseal ring. The cover body 2 and the container 1 are tightly connected bya buckle mechanism 7. The connection of the cover body 2 and thecontainer 1 by the buckle mechanism 7 further improves the connectiontightness of the container. This structure in comparison with the screwthread connection structure is easier to be assembled and disassembled.

Referring to FIG. 1 and FIG. 3, according to the above embodiment of thepresent invention, the buckle mechanism 7 includes a clamping wing 71disposed on the cover body 2 and a rib 72 disposed on the container 1and buckled with the clamping wing 71. The buckle mechanism 7 includes aclamping wing 71 and a rib 72 buckled with the clamping wing 71. Thisbuckle structure improves the attachment strength between the cover body2 and the container 1, so that the fluid reservoir has a better sealingperformance. Also, the screw thread connection of the cover body 2 andthe container 1 is not required, which overcome the defects of theinconvenience of detachment and possible leakage. Alternatively, thebuckle mechanism 7 includes a clamping wing disposed on the container 1and a rib disposed on the cover body 2 and buckled with the clampingwing, which can also achieve the function and performance of the aboveembodiment.

Furthermore, to improve the sealing tightness performance, the clampingwing 71 may be provided with a retainer 73. The retainer 73 is buckledwith the rib 72, which enables a firmer connection between the coverbody 2 and the container 1.

Referring to FIG. 1, FIG. 2, FIG. 4 and FIG. 5, according to theembodiments of the present invention, the filter device 5 is a filterscreen having a buckle portion, and the filter screen is buckled on thecover body 2. The manner of buckling the filter screen on the cover body2 provides the convenience of cleaning and replacement of the filterscreen and is easy to fabricate. Furthermore, the filter screen isprovided with a reinforcing rib 51. The reinforcing rib 51 at leastincludes an annular ring 52 buckled with the cover body. The rim of thebuckling annular ring 52 may be designed into a shape corresponding tothe buckle portion on the cover body 2, so as to facilitate bucklingwith the cover body 2. Furthermore, a raised portion 53 may be providedon the filter screen in a direction departing from connecting port 3.For example, the raised portion 53 is disposed at a center of thereinforcing rib, and the filter screen may be detached from the coverbody by pulling the raised portion, which provides the convenience ofcleaning and replacement of the cover body.

Referring to FIG. 1, according to the embodiments of the presentinvention, the connecting port 3 is provided with an inserted member 31,and the inserted member 31 is used together with the paint spray gun. Asthe connecting port is provided with an inserted member 31, and theinserted member 31 is used together with the paint spray gun, differentinserted members 31 may be disposed for matching different models of thepaint spray gun.

According to the embodiments of the present invention, the container 1is provided with or formed with a placement portion 9 for placinghorizontally. For example, the placement portion 9 may be a planarstructure of the bottom of the container 1, a seat structure disposed onthe bottom of the container 1 or an extending portion that stretches outfrom the bottom of the container 1. Therefore, when detaching thecontainer 1 from the paint spray gun, the container 1 may be placed onthe top of a table on the floor, which provides the convenience ofrefilling the paint.

While there has been shown several and alternate embodiments of thepresent invention, it is to be understood that certain changes can bemade as would be known to one skilled in the art without departing fromthe underlying scope of the present invention as is discussed and setforth above and below including claims. Furthermore, the embodimentsdescribed above and claims set forth below are only intended toillustrate the principles of the present invention and are not intendedto limit the scope of the present invention to the disclosed elements.

1. A fluid reservoir for a paint spray gun, comprising: a containerhaving an opening and a cover body that sleeves on the containeropening, wherein the cover body is provided with a connecting port thatconnects with the paint spray gun, a side of the container has a scale,the container is provided with a ventilation device, a filter device isinstalled in the fluid reservoir, the cover body is provided with agroove corresponding to a periphery of the container opening, theperiphery of the container opening is inserted into the groove, and thecover body and the container are tightly connected by a bucklemechanism.
 2. The fluid reservoir for the paint spray gun according toclaim 1, wherein the buckle mechanism comprises a clamping wing disposedon the cover body and a rib disposed on the container and buckled withthe clamping wing.
 3. The fluid reservoir for the paint spray gunaccording to claim 1, wherein the buckle mechanism comprises a clampingwing disposed on the container and a rib disposed on the cover body andbuckled with the clamping wing.
 4. The fluid reservoir for the paintspray gun according to claim 2, wherein the clamping wing is providedwith a retainer and the retainer is buckled with the rib.
 5. The fluidreservoir for the paint spray gun according to claim 1, wherein thefilter device is a filter screen having a buckle portion and the filterscreen is buckled on the cover body.
 6. The fluid reservoir for thepaint spray gun according to claim 5, wherein the filter screen isprovided with a reinforcing rib and the reinforcing rib at leastcomprises an annular ring buckled with the cover body.
 7. The fluidreservoir for the paint spray gun according to claim 6, wherein thefilter screen is provided with a raised portion departing from theconnecting port.
 8. The fluid reservoir for the paint spray gunaccording to claim 1, wherein a seal ring is installed in the groove andthe periphery of the container opening abuts against the seal ring. 9.The fluid reservoir for the paint spray gun according to claim 1,wherein the connecting port is provided with an inserted member and theinserted member is used together and matches with the paint spray gun.10. The fluid reservoir for the paint spray gun according to claim 1,wherein the container is provided with or formed with a placementportion for placing horizontally.
 11. The fluid reservoir for the paintspray gun according to claim 3, wherein the clamping wing is providedwith a retainer and the retainer is buckled with the rib.